Laboratorio di Biomeccanica e Innovazione Tecnologica, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy.
Eastcott Referral Hospital, Swindon, Wiltshire, UK.
Open Vet J. 2020 Apr;10(1):86-93. doi: 10.4314/ovj.v10i1.14. Epub 2020 Mar 22.
Cranial cruciate ligament (CCL) rupture is the most common orthopedic pathology in dog and in men. In human, optical computer-assisted technique is considered as a repeatable and reliable method for the biomechanical assessment of joint kinematics and laxity in case of CCL surgery.
To evaluate the repeatability and reliability afforded by clinical tests in terms of laxity measured by means of a computer-assisted tracking system in two canine CCL conditions: CCL-Intact, CCL-Deficient.
Fourteen fresh frozen canine stifles were passively subjected to Internal/External (IE) rotation at 120° of flexion and Cranial drawer test (CC). To quantify the repeatability and the reliability, intra-class correlation coefficient (ICC) and the mean percent error were evaluated (Δ %).
The study showed a very good intra-class correlation, before and after CCL resection for kinematics tests. It was found a minimum ICC = 0.73 during the IE rotation in CCL-Intact and a maximum value of ICC = 0.97 for the CC displacement in CC-Deficient. IE rotation with CCL-Intact is the condition with the greatest Δ % = 14%, while the lowest Δ % = 6% was obtained for CC displacement in CCL-Deficient.
The presented work underlined the possibility of using a computer-assisted method also for biomechanical studies concerning stifle kinematics and laxity.
十字韧带（CCL）断裂是犬和人类中最常见的骨科病理。在人类中，光学计算机辅助技术被认为是一种可重复且可靠的方法，可用于评估 CCL 手术后关节运动学和松弛度的生物力学。
评估临床测试在通过计算机辅助跟踪系统测量松弛度方面的重复性和可靠性，在两种犬 CCL 情况下：CCL-完整，CCL-缺失。
14 个新鲜冷冻的犬膝关节在 120°弯曲时被动地进行内/外（IE）旋转和前抽屉试验（CC）。为了量化重复性和可靠性，评估了组内相关系数（ICC）和平均百分比误差（Δ%）。
该研究显示，在 CCL 切除前后，运动学测试的组内相关性非常好。在 CCL-完整的 IE 旋转中发现最小 ICC = 0.73，而在 CC-缺失的 CC 位移中发现最大 ICC = 0.97。IE 旋转时 CCL-完整的条件下Δ%最大为 14%，而 CC 位移时 CCL-缺失的条件下Δ%最小为 6%。
本研究强调了使用计算机辅助方法进行膝关节运动学和松弛度生物力学研究的可能性。
